WebSocket Servers Open Source Tools

Alternative toTwilio

Real-time voice and video infrastructure on open source WebRTC

• 14,862 GitHub stars
• Apache-2.0Licence Apache-2.0
• #AI Agents

Alternative toSendbird Chat

Self-hosted instant messaging platform for web and mobile apps

• 13,529 GitHub stars
• GPL-3.0Licence GPL-3.0
• #Chat

Alternative toPusher

Scalable real-time messaging server with WebSocket support

• 10,892 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toPusher

Self-hosted Pusher-compatible WebSocket server, open source

• 5,635 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toHookdeck

Webhook platform with delivery guarantees, retries, and signing

• 3,457 GitHub stars
• MITLicence MIT

Alternative toDiscord

Free open source Discord reimplementation with full API parity

• 2,210 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Chat

Alternative toFirebase

Self-hosted backend with real-time API and search built in

• 1,668 GitHub stars
• Apache-2.0Licence Apache-2.0
• #BaaS

Alternative toDiscord

Self-hosted Discord-style chat with encrypted DMs and voice

• 645 GitHub stars
• AGPL-3.0Licence AGPL-3.0